NEUTRON THERAPY FACILITY
This block of plastic composite was used for shielding above the Cyclotron Facility's vertical collimator (1977).
Image Credit: NASA/GRC/DONALD HUEBLER
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https://www.nasa.gov/image-detail/grc-1977-c-01523/
Image CreditNASA/GRC/DONALD HUEBLER
Size2996x2889px